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问题 单项选择题

从医院选取了糖尿病患者和非糖尿病患者，观察体重是否超重与糖尿病的联系，须计算的指标为

A．患病率
B．患病率比
C．发病率
D．发病率比
E．比值比

答案

参考答案：E

写作题
假设你是Lin Tao.根据下列表格写一篇介绍自己的短文。(不少于六个句子) （7分）
Name: Lin Tao
Age:13
Class:4
Grade:7
From: China
Tel: (010)79860980
Look: black eyes, a small mouth
                                                                     
                                                                     
                                                                     
                                                                     
                                                                     
                                                                     
                                                                     
                                                                     
                                                                     
                                                                     
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选择题

It's dark (暗的) in the room. Please ______ the light. [ ]

A. turn on

B. turn up

C. turn down

D. turn off

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